Student capstone and applied projects from ASU's School of Sustainability.

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In Senegal, West Africa, soils are a vital resource for livelihoods and food security in smallholder farming communities. Low nitrogen (N) soils pose obvious challenges for crop production but may also, counterintuitively, promote the abundance of agricultural pests like the Senegalese locust, Oedaleus senegalensis. In this study I investigated how

In Senegal, West Africa, soils are a vital resource for livelihoods and food security in smallholder farming communities. Low nitrogen (N) soils pose obvious challenges for crop production but may also, counterintuitively, promote the abundance of agricultural pests like the Senegalese locust, Oedaleus senegalensis. In this study I investigated how the abundance of locusts and grasshoppers are impacted by soil fertility through plant nutrients and how these variables change across land use types. We worked in two rural farming villages in the Kaffrine region of Senegal. Overall, there was little variation in soil properties and an agricultural landscape low in soil organic matter (SOM) and inorganic soil nitrogen. I corroborated that SOM is a significant driver of soil inorganic N, which had a positive relationship to plant N content. Of the management practices we surveyed, fallowing fields was important for soil nutrient restoration and years spent fallow was significantly correlated to inorganic soil N and SOM. O. senegalensis was least abundant in groundnut areas where plant N was highest. Additionally, I found a significant negative correlation between O. senegalensis abundance and plant N, suggesting that plant nutrients are an important driver of their populations. Grasshoppers, excluding O. senegalensis, were more numerous in grazing areas and fallow areas, perhaps due to a higher diversity of ecological niches and host plants. These results connect land use, soil, and vegetation to herbivores and suggest that improving soil fertility could be used as an alternative to pesticides to keep locusts at bay and improve crop yields.
ContributorsWord, Mira (Author) / Hall, Sharon (Contributor) / Robinson, Brian (Contributor) / Manneh, Balanding (Contributor) / Beye, Alioune (Contributor) / Cease, Arianne (Contributor)
Created2018-04-10
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Description

Often characterized by intense commoditization, heavy ecological footprint, and monopolistic governance mechanisms, the present-day industrialized food system has contributed to a growing distrust among citizens around the world. In response to this, local food initiatives promoting sustainable food and agricultural systems have formed. Little empirical research exists regarding how these

Often characterized by intense commoditization, heavy ecological footprint, and monopolistic governance mechanisms, the present-day industrialized food system has contributed to a growing distrust among citizens around the world. In response to this, local food initiatives promoting sustainable food and agricultural systems have formed. Little empirical research exists regarding how these local food initiatives think about their experience in relation a relevant conceptual framework. As such, this research entails the development of a conceptual framework based on Schlosberg and Cole’s (2015) sustainable materialist frame and literature regarding how local food initiatives may be characterized. This consists of sustainability values, collective action and political perspectives. Thirteen participants from two local food initiatives in Lüneburg, Germany were interviewed to provide in-depth insights into participant perceptions in relation to the three dimensions. Results indicate that participants exhibit strong values related to sustainability (e.g. knowledge of food origin, environmental concern, etc.), and appreciate the practical, collective work of the initiative. Additionally, a clash was found between initiative goals and participants’ perception of a lack of commitment and strong uniformity in the initiatives. Furthermore, many participants expressed political motivation and even perceived group actions as counter to the mainstream food system, although both initiatives did not identify as a politically motivated. This research sheds light on opportunities and barriers for initiative success and indicates the potential for the developed framework to serve as a lens for understanding other social initiatives aimed toward sustainability transformations.

ContributorsTrigg, Hannah (Author) / Fischer, Daniel (Contributor) / Wharton, Christopher (Contributor) / von Wehrden, Henrik (Contributor)
Created2018-06-29